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https://issues.apache.org/jira/browse/HIVE-23164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17090245#comment-17090245
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Hive QA commented on HIVE-23164:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 2m
15s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 8m
46s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
31s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m
7s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 1m
17s{color} | {color:blue} standalone-metastore/metastore-server in master has
190 extant Findbugs warnings. {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 3m
54s{color} | {color:blue} ql in master has 1530 extant Findbugs warnings.
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
22s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m
30s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m
6s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
36s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m
36s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
23s{color} | {color:green} The patch metastore-server passed checkstyle {color}
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| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
43s{color} | {color:green} ql: The patch generated 0 new + 6 unchanged - 1
fixed = 6 total (was 7) {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 5m
35s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
20s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red} 0m
16s{color} | {color:red} The patch generated 2 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 33m 26s{color} |
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Optional Tests | asflicense javac javadoc findbugs checkstyle compile |
| uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian
3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux |
| Build tool | maven |
| Personality |
/data/hiveptest/working/yetus_PreCommit-HIVE-Build-21864/dev-support/hive-personality.sh
|
| git revision | master / 7ff8bd0 |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.0 |
| asflicense |
http://104.198.109.242/logs//PreCommit-HIVE-Build-21864/yetus/patch-asflicense-problems.txt
|
| modules | C: standalone-metastore/metastore-server ql U: . |
| Console output |
http://104.198.109.242/logs//PreCommit-HIVE-Build-21864/yetus.txt |
| Powered by | Apache Yetus http://yetus.apache.org |
This message was automatically generated.
> server is not properly terminated because of non-daemon threads
> ---------------------------------------------------------------
>
> Key: HIVE-23164
> URL: https://issues.apache.org/jira/browse/HIVE-23164
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2
> Reporter: Eugene Chung
> Assignee: Eugene Chung
> Priority: Major
> Attachments: HIVE-23164.01.patch, HIVE-23164.02.patch,
> HIVE-23164.03.patch, HIVE-23164.04.patch,
> thread_dump_hiveserver2_is_not_terminated.txt
>
>
> HiveServer2 which receives the deregister command is at first preparing
> shutdown. If there's no remaining session, HiveServer2.stop() is called to
> shut down. But I found the case that the HiveServer2 JVM is not terminated
> even if HiveServer2.stop() has been called and processed. The case is always
> occurred when the local(embedded) metastore is used.
> I've attached the full thread dump describing the situation.
> [^thread_dump_hiveserver2_is_not_terminated.txt]
> In this thread dump, you can see some bunch of 'daemon' threads, NO main
> thread, and some 'non-daemon' thread(or user thread)s. As specified by
> [https://www.baeldung.com/java-daemon-thread], if there is at least one user
> thread exists, JVM does not terminate. (Note that DestroyJavaVM thread is
> non-daemon but it's special.)
>
> {code:java}
> "pool-8-thread-1" #24 prio=5 os_prio=0 tid=0x00007f52ad1fc000 nid=0x821c
> waiting on condition [0x00007f525c500000]
> java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00000003cfa057c0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
> at
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:748)
> Locked ownable synchronizers:
> - None
> {code}
> The thread above is created by the ScheduledThreadPoolExecutor(int coreSize)
> constructor with default ThreadFactory which always makes a thread
> non-daemon. If such thread pool is not destroyed by calling
> ScheduledThreadPoolExecutor.shutdown() method, JVM cannot terminate! The only
> way to kill is TERM signal. If JVM receives TERM signal, it ignores
> non-daemon threads and terminates.
> So I have been digging modules which create ScheduledThreadPoolExecutor with
> non-daemon threads and I got it. As you may guess, it's the local(embedded)
> metastore. ScheduledThreadPoolExecutor is created by
> org.apache.hadoop.hive.metastore.HiveMetaStore.HMSHandler#startAlwaysTaskThreads()
> and ScheduledThreadPoolExecutor.shutdown() is never called.
> Plus, I found another usage of creating such ScheduledThreadPoolExecutor and
> not calling its shutdown.
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